1928405783 EuCon Cover Flat Exit Left/Right With CPA Black Connector Accessories

Continuous training and employee education have not only improved quality awareness, but also in addition to knowledge, but also convey the feeling of problems and sources of errors -not only in terms of pressing technology. Or briefly: If the operator knows what he is doing and why he does something, he will identify the error!

Which tests can be detected?

In order to ensure the production quality of the connection connection connection using the opening pressure connector, the corresponding test method is used for different possible errors. Table 1 shows different defects and test methods that can be used to detect them.

In the previous article, why does the terminal of the circuit breaker and the contactor change color? , We discuss the silver terminals of low -pressure circuit breakers and contactors in a sulfur -containing environment (even if a small amount of sulfur in the atmosphere is long enough), sulfur -changing phenomenon, but copper tin and nickel -plated terminals will not be. The end of the previous article left a topic: In order to avoid the troubles brought by color change, why not directly plated tin or nickel plating?

First of all, we need to know why other metals are plated on the surface of the conductor? Because the performance of a connector is basically determined by its surface, such as surface pollution, oxidation, secondary oxidation, formation, and corrosion of sulfides. These surface pollution increases contact resistance and is harmful to connection reliability. Therefore, to ensure that the contact resistance of the contact surface is at a lower level and long -term stability is the prerequisite to achieve reliable connection. By appropriately changing the thickness and process of the plating layer within a certain range, the different performance of the plating can be obtained. Ensure for long -term stability of contact resistance. Secondly, why does copper choose silver plating, tin plating or nickel plating? Because naked copper is prone to generate high-oxide copper with high resistivity in the air (the resistivity of the copper oxide copper is 5x10^8Ω.m, and the resistance of pure copper is 0.0175x10^(-6) ω.m), and and the ω.m), and the pure copper, and the pure copper, The thickness is related to temperature and time. Copper in the atmosphere, the resistance of metal-metal contact during the beginning of the atmosphere is relatively low, but due to the existence of oxygen in the atmosphere, the continuous oxidation process will increase the contact resistance rapidly, resulting in overheating surfaces, easily trigger fires, etc. Safety accidents, so if it is pure copper overlap, you need to polish the oxidation layer on the contact surface in advance before matching to ensure low contact resistance.

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